Rules for Commercial Letters

The Start
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Dear Sir or Madam, (*)
_____________________
Dear Mr Sloan, (**)
Dear Mrs Sloan, (**)
Dear Miss Sloan, (**)
Dear Ms Sloan, (**)
_____________________
Dear Mary-Lynn, (***)
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The Finish
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Yours Faithfully, (*)
Yours Sincerely, (**)
Best wishes, (***)
_____________________
American English
Sincerely yours, (**)
Yours truly, (**)
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Notes:
(*) Suitable if you don't know the name of the person you are writing to.
(**) Suitable if you know their name.
(***) Suitable if the person is a close business contact or friend.
in "italic" is possible o change about situation.
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The Reference
With (or In) reference to your advertisement on today's newspaper...
..................................................... your purchase order #1536...
......................................................your phone call today....
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The Reason for Writing
I am writing to enquire about....
...........................apologize for.....
........................... confirm....
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Requesting
Could you possibly........?
I would be grateful if you could.....
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Agreeing to Request
I would be delighted to .....
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Giving bad news
Unfortunately....
I'm afraid that.....
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Enclosing / Attaching Documents
I am enclosing ..... / I am attaching ....
Please find enclosed..... / Please find attached....
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Close letters with a friendly phrase or reference to future contact
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Closing Remarks
Thank you for your help.
Please contact us again if, you have any questions.
............................................ there are any problems.
.............................................we can help you in any way.
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Reference to Future Contact
I look forward to hearing from you soon.
............................. meeting you next Tuesday in your office.
..............................seeing you next week.